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KN Phase Shifts in Chiral SU（3） Quark Model

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Communications in Theoretical Physics 2004年第4X期42卷 577-580页

作者： HUANGFei zhangzong-Ye YUYou-Wen InstituteofHighEnergyPhysics P.O.Box9184Beijing100039China

The isospin I = 0 and I = 1 kaon-nucleon S and P partial waves phase shifts have been studied in the chiral SU(3) quark model by solving a resonating group method equation. When the parameters of the chiral fields are taken in a reasonable region, the numerical results of S-wave are in good agreement with the experimental data, and the P-wave phase shifts can also be explained qualitatively by the calculation of only central force considered.

关键词：高能物理学 k介子-核子散射夸克模型手性对称相位转换

Structures of（ΩΩ）0＋and（[1]Ω）1＋in Extended Chiral SU（3） Quark Model

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Communications in Theoretical Physics 2003年第3X期40卷 332-336页

作者： zhangzong-Ye YUYou-Wen DAILian-Rong InstituteofHighEnergyPhysics theChineseAcademyofSciencesBeijing100039China DepartmentofPhysics LiaoningNormalUniversityDalian116029China

The structures of (ΩΩ)0+ and ([1]Ω)1+ are studied in the extended chiral SU(3) quark model in which vector meson exchanges are included. The effect from the vector meson fields is very similar to that from the one-gluon exchange (OGE) interaction. Both in the chiral SU(3) quark model and in the extended chiral SU(3) quark model,di-omega (ΩΩ)0+ is always deeply bound, with over one hundred MeV binding energy, and ([1]Ω)1+ 's binding energy is around 20 MeV. An analysis shows that the quark exchange effect plays a very important role for making di-omega (ΩΩ)0+ deeply bound.

关键词：夸克模型手征对称性二重子粒子物理学结构矢量介子交换相互作用

Rolling route for refining grains of super light Mg-Li alloys containing Sc and Be

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Transactions of Nonferrous Metals Society of China 2010年第8期20卷 1374-1379页

作者： CHIANG Chih-te LEE Shyong Department of Mechanical Engineering National Central University

Pioneering work on Sc or/and Be added Mg-Li alloys with refined grains was initiated. Various rolling-based thermo-mechanical treatments on these Mg-Li alloys were carried out. Four Mg-Li alloys were prepared by vacuum melting process. A unique route for producing fine grains was applied which concluded solution treatment at 350 ℃, cold rolling with 60% thickness reduction and 250 ℃ annealing, successively.

关键词： Mg-Li alloy beryllium scandium solid solution strengthening

Compaction-induced stress in geosynthetic-reinforced granular base course--A discrete element model

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第4期10卷 669-677页

作者： te Pei Xiaoming Yang School of Civil and Environmental Engineering Oklahoma State UniversityStillwaterUSA

A discrete element method(DEM) model was used to simulate the development of compaction-induced stress in a granular base course, with and without geogrid reinforcement. The granular base course was modeled as a mixture of uniformly sized triangular particles. The geogrid was modeled as a series of equally spaced balls that interact with each other through long-range interaction contacts. The longrange interaction contact was also used to simulate a deformable subgrade. The compactor was modeled as a solid cylinder rolling at a constant speed. The DEM model shows that the geogridreinforced granular base course gains additional compaction-induced stress due to the residual tensile stress developed in the geogrid. The residual tensile stress in the geogrid increases with the number of compaction passes. Parametric analyses were also conducted to assess the effects of geogrid stiffness and subgrade modulus on the compaction-induced stress.

关键词： Compaction Geosynthetics Granular soils Numerical analysis

Variational Calculation of Lattice SU(N) Gauge System

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Chinese Physics Letters 1996年第5期13卷 337-339页

作者： ZHENG Xi-te Shahram Alavian Department of Applied Physics Sichuan Union University(Chengdu University of Science and Technology)Chengdu 610065 Saskatchewan Accelerator Laboratory University of SaskatchewanSaskatoonSaskatchewanCanadaS7N5C6(present address)

A general method for an analytical calculation of SU(N)lattice gauge theories with finite N≥3 *** an example,the order parameter(E)of lattice SU(4)gauge systetn is *** result is in good agree^nent with Monte Carlo si... 详细信息

关键词： gauge lattice finite

Large time behaviour for the Fokker-Planck equation with general potential

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Science China Mathematics 2018年第1期61卷 137-150页

作者： te Li Zhifei Zhang School of Mathematical Sciences Peking University

In this paper, we study the large time behaviour of the solution of the Fokker-Planck equation with general potential. For the long range potential, we prove the polynomial decay estimate in time of the solution. For ... 详细信息

关键词： Fokker-Planck equation large time behavior hypocoercivity method

Hydrothermal Synthesis and Crystal Structure of Zinc(Ⅱ) Dinicotinate Complex [Zn(nic)_2(H_2O)_4](nic=nicotinic acid):A Three-dimensional Hydrogen-bond Network

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Chemical Research in Chinese Universities 2004年第3期20卷 377-379页

作者： MAOHong-yan zhangzong-pei ZHANGHong-yun XUChen WANGEn-bo WUQing-an ZHUYu FacultyofChemistry NortheastNormalUniversityChangchun130024P.R.China FacultyofChemistry ZhengzhouUniversityZhengzhou450052P.R.China

Introduction Nicotinic acid and its transition-metal comple-xes have become increasingly important due to their potential applications as cosmetics or medicines with antitumor, antibacterial and antifungal activities, and the activity in the maintenance of normal glucose metabolism[1-3], etc. A major research effort has been made to generate such materials and to study their biological activity[4-9]. But few of the previous works have directed towards the structure investigation of these metal complexes[6-9]. So, in this report we aim at testing the effect of hydrothermal synthesis on the formation of the crystal structures of crystalline [Zn(nic)2(H2O)4 ](nic=nicotinic acid).

关键词： Nicotinic acid Zinc(Ⅱ) complex Crystal structure Hydrothermal synthesis

Nanomaterials incorporated ultrasound contrast agents for cancer theranostics

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Cancer Biology & Medicine 2016年第3期13卷 313-324页

作者： Lei Fu Heng-te Ke College of Pharmaceutical Sciences Soochow University Center of Systems Medicine Chinese Academy of Medical Sciences Suzhou Institute of Systems Medicine

Nanotechnology provides various nanomaterials with tremendous functionalities for cancer diagnostics and ***, theranostics has been developed as an alternative strategy for efficient cancer treatment through combination of imaging diagnosis and therapeutic interventions under the guidance of diagnostic results. Ultrasound(US) imaging shows unique advantages with excellent features of real-time imaging, low cost, high safety and portability, making US contrast agents(UCAs)an ideal platform for construction of cancer theranostic agents. This review focuses on the development of nanomaterials incorporated multifunctional UCAs serving as theranostic agents for cancer diagnostics and therapeutics, via conjugation of superparamagnetic iron oxide nanoparticles(SPIOs), Cu S nanoparticles, DNA, si RNA, gold nanoparticles(GNPs), gold nanorods(GNRs), gold nanoshell(GNS), graphene oxides(GOs), polypyrrole(PPy) nanocapsules, Prussian blue(PB) nanoparticles and so on to different types of UCAs. The cancer treatment could be more effectively and accurately carried out under the guidance and monitoring with the help of the achieved theranostic agents. Furthermore, nanomaterials incorporated theranostic agents based on UCAs can be designed and constructed by demand for personalized and accurate treatment of cancer, demonstrating their great potential to address the challenges of cancer heterogeneity and adaptation, which can provide alternative strategies for cancer diagnosis and therapeutics.

关键词： Cancer theranostics ultrasound contrast agents nanomaterials nanomedicine

Energy-Based Collaborative Spectrum Sensing for Cognitive UWB Impulse Radio

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Journal of Electronic Science and technology 2015年第2期13卷 174-180页

作者： Wei-Chiang Wu Chun-te Wu Department of Electrical Engineering Da-Yeh University

This paper focuses on the issue of collaborative spectrum sensing in cognitive ultra wideband（CUWB） impulse radio. We employ energy-based signal detection method and apply the Neyman-Pearson（NP） decision rule to determine the optimum threshold. Two cooperative spectrum sensing schemes are developed in this paper. The decision fusion scheme is based on hard decision, in which each cooperating cognitive user（CU） sends its own local decision to the fusion center（FC）. The FC then makes a final decision according to the majority voting rule. Alternatively, the data fusion scheme is based on soft decision, in which each local CU sends its observed value directly to the FC. The FC combines these values, compares to a threshold and then makes the final decision. The performances of both schemes are studied by using analytical tools and computer simulations. The receiver operating characteristics（ROC）, which reveal the probability of detection versus false-alarm curve, are employed to evaluate the system performance under different scenarios. Simulation results demonstrate that the data fusion scheme outperforms the decision fusion scheme and verify that the collaborative spectrum sensing has practical importance in CUWB networks.

关键词： Impulse collaborative false Spectrum wideband alarm apply receiver verify scenarios